Level.



No. 884,176. PATENTEDAPR. 7, 1908. A.'A. LO'VELESS.

v LEVEL. APPLICATION FILED MAY 16, 1907.

g My claimed.

and is provided near one end with the usual ALVA A. LOVELESS, OF DACULA, GEORGIA.

LEVEL.

Specification of Letters Patent.

Patented April 7, 1908.

Application filed May 16, 1907. Serial No. 374,024.

To all whom it may concern:

Be it known that I, ALVA A. LovELEss, a citizen of the United States, residing at Dacula, in the county of Gwinnet and State of Georgia, have invented new and useful Improvements in Levels, of which the following is a specification.

My invention is an improved spirit level adapted for use also for ascertaining the degree of inclination of inclined timbers, rafters, joists and other work and it comprises a stock having a curved tube containingthe spirit and a protractor scale to indicate various angles with reference to the bubble in the tube, as hereinafter described and In the accompanying drawings, Figure 1 is a side elevation of a level constructed in accordance with my invention. Fig. 2 is a plan view of the central portion of the same, showing the curved spirit tube and the pro tractor scale. Fig. 3 is a transverse central sectional view of the same. Fig. 4 is a longitudinal central sectional view of the same.

The stock 1 is of the usual construction transverse opening 2, in which is set the usual transversely disposed spirit tube 3 for use as a plumb.

On one side of the stock at the center thereof, is a segmental block 4 which is here shown as semi-circular in form. Said block is provided, at a point midway between its sides with a peripheral groove 5 which receives a spirit tube 6 which is curved to correspond with the curvature of the outer edge of the block 4. The said tube is preferably made of glass and the same is nearly filled with spirit or other suitable fluid to form a bubble indicated at 7. ()n the curved edge of the said block is a plate 8, preferably made of metal, which corresponds with the curvature of the periphery of the block, covers the same and is provided at its ends with outi turned portions 9 which bear on the stock 1 and are secured thereto by means of screws or pins 10. The said plate 8 is provided with a longitudinal centrally disposed slot 11 which partly uncovers the tube 6 so that the latter and the bubble therein are visible through the said slot and the said plate is provided on its outer surface, preferably on opposite sides of the slot, as here shown, with a protractor scale 12 indicating degrees or other unit divisions of acircle. In practice, the said protractor scale will be appropriately numbered.

In the use of my improved level, when the same is in a perfectly horizontal position, the

center of the bubble in the curved spirit tube will correspond with the central mark on the protractor scale. When the stock of the implement is placed against an inclined ob ject, the position of the bubble in the spirit tube, with reference to the protractor scale, will indicate the degree of such inclination, as will be understood.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is A level of the class described comprising a stock, a segmental block on one side thereof having a curved periphery provided with a groove, a longitudinally curved spirit tube in such groove of such block, and a curved plate on the periphery of the block, retaining the spirit tube in the groove thereof, having a slot disclosing such spirit tube and further provided on its outer side with a protractor scale at the side of the slot, said plate having its end portions out-turned and attached to the stock.

In testimony whereof, I aflix my signature in presence of two witnesses.

ALVA A. LOVELESS.

Witnesses:

D. W. WrLsoN, S. A. I-IAGooD. 

